Seiko DPU-S445 SERIES Spécifications télécharger pdf (Page 7)

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CHAPTER 1

TERMS USED IN THIS MANUAL

This chapter describes the terms used in this manual.

 INPUT BUFFER AND LINE BUFFER

When the DPU-S445 (hereinafter it is referred to as “printer”) receives data (character codes and

commands) from the host devices, it stores the data in the printer input buffer. The input buffer has

a capacity of 4K bytes (4096 bytes). Then, the printer retrieves data from the input buffer. If data is

character code, data is stored into the line buffer. If data is command, data is executed as

command immediately.

The printer inputs character codes to the line buffer until the amount of character codes reaches

the amount to be printed on one line, then prints the characters. The printer repeats this operation

to print all the character data.

The relationship between the input buffer and line buffer is illustrated in Figure 1-1.

Figure 1-1 Relationship betw

een Input Buffer and Line Buffer

 1-by

te characters and 2-byte characters

The printer can print two-size characters; 1-byte characters and 2-byte characters.

Table 1-1 lists the character types which can be printed by 1-byte and 2-byte characters.

Table 1-1 Character T

ypes and Relationship between 1-byte and 2-byte Characters

Character Types

1-byte characters

Katakana character (ANK)

Extended graphics character (IBM Compatible)

Codepage 1252

2-byte characters Kanji, User-defined characters

*1 The size of a character to be printed differs depending on the font specified. (See 2.1 Printer Specifications.)

One Line of Characters

is Printed.

Line Buffer Print Operation

Input Buffer

Host Device

1 2 3 4 5 6 7 8 9 10 11 12 ... 171 172

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Seiko DPU-S445 SERIES Spécifications Page 7